No. The answer is D, not A. to be reserved - the reserving will happen in the future reserved - the reserving already happened.
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norwolfas she sat at the table____ for customersto be reserved is grammatical, but it doesn't have the same meaning, as explained above.
norwolfthe table to have been reserved for customersWe can assign a meaning to it, but it is so excessively awkward that it really should not be used. It's better to make the situation more explicit by adding a few more words.